Clean Air in Cities vs MoonPhaser
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Clean Air in Cities
This app provides real-time air quality data, including PM2.5 and ozone levels, and forecasts for your location. It illustrates the health impact of air pollution on populations and offers daily notifications.
- Real-time PM2.5 and ozone concentrations
- Daily air pollution forecast notifications
- Population health impact assessment
- Short-term and long-term exposure alerts
- WHO guideline-based alert bands
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The App illustrates the health impact of short and long-term exposure to air pollution on populations as a whole and offers daily forecast notifications. It shows concentrations of dangerous airborne particles (PM₂.₅) and ozone (O₃) for the latest hour at your current location from the OpenWeather service together with our Air Pollution Alert Index for short-term exposure over the last and next 24 hours. The App also estimates the number of deaths attributable to long-term exposure to air pollution in England on a pro rata, calendar year-to-date basis and the time to the next attributable death as well as displaying the percentage of total deaths attributable to air pollution. It does not estimate or display the risk for an individual or the number of actual deaths from air pollution. Users can also see estimates of total population-weighted exposure to annual average concentrations of PM₂.₅ in different local areas and/or regions in England. The alert bands for short and long-term exposure to air pollution are based on Clean Air in London's interpretation of the World Health Organisation's air quality guidelines published in September 2021.
MoonPhaser
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MoonPhaser is a simple way to tell what moon phase it is. You can even have it on your Home Screen! Features to come: - Calendar feature
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Verdict
The clearest difference is update cadence: Clean Air in Cities at every 3 weeks against MoonPhaser's every 3 months. MoonPhaser's advantage is iOS requirement (14.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Clean Air in Cities ships an update every 3 weeks, MoonPhaser every 3 months. The most recent releases landed on October 23, 2026 and October 27, 2026 respectively.
| Parameter | Clean Air in Cities | MoonPhaser |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Every 3 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPod, Apple Watch |
| Requires iOS | 17.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 30 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Clean Air in London | Charlie Kingsland |
In-app purchases
Clean Air in Cities
No in-app purchases
MoonPhaser
No in-app purchases
Questions
Is Clean Air in Cities free?
Is MoonPhaser free?
Do Clean Air in Cities or MoonPhaser have ads?
Which is updated more often, Clean Air in Cities or MoonPhaser?
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